Though there are a few flaws in the creation of this film they are glossed over by the powerful performances in The Unknown Man, particularly by it's star Walter Pidgeon.
Pidgeon plays a top attorney, a kind of Louis D. Brandeis who takes great pride in loving the law for its own sake. I've met a couple of attorneys like this in my life and they do exist. Some even wind up on the Supreme Court, like Brandeis.
Pidgeon is like Brandeis, a lawyer who specializes in civil practice. He's both respected and successful. When Philip Ober comes to him and asks Pidgeon to take on a criminal case to save an innocent man's life, Pidgeon agrees.
His client is young Keefe Brasselle arrested in the murder of a young locksmith. Pidgeon gets him off. But later we find out he did the deed and furthermore Brasselle is a young punk who extorts money for organized crime.
That sets in motion a chain of events which Pidgeon pushes that in the end bring about a certain cosmic justice which corrects the mistake that man's justice made. I think if Louis Brandeis had gotten himself involved in a cosmic jackpot the way Pidgeon does it would come out the same.
There are also some nice performances by wife Ann Harding, District Attorney Barry Sullivan who narrates the film in flashback, Eduard Franz the head of the Crime Commission, Lewis Stone as (what else) the Judge, and the original victim's father Konstantin Shayne. There are indeed more than one victim before things are righted.
Walter Pidgeon is the type of man they DON'T make lawyer jokes about, they give them awards. Nicely cast and nicely done film.